Furnace-grate.



.G. F. SPENCER.

FURNACE GRATE.

APPLICATION FILED 02c. 21, 1915.

1,206,046. Patented Nov. 28, 1916.

4 SHEETS-SHEET I- G. F. SPENCER.

FURNACE GRATE.

APPLICATION man DEC.27. I9l5.

Patented Nov. 28, 1916.

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G. F. SPENCER.

FURNACE GRATE. APPLICATION FILED DEC-27,19I5.

1 06,046. Patented Nov. 28, 1916.

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GEORGE E. SPENCER, OF THOMPSON, PENNSYLVANIA.

FURNACE-GRA'IE. V i

Specification of Letters Patent.

Patented Nov. 28, 1916.

Application filed December 27, 1315. Serial No. 88,785.

- To all whom it may concern:

new and useful Improvements in Furnace Grates, of which the following is a specification.

This invention relates to certain new and useful improvements in furnaces and more particularly to a grate structure, the main object being to provide such a structure for spreading the fuel thereover in an even manner.

A further aim resides in providing a grate composed of relatively movable sections with means for moving adjacent sections in opposite directions and, also, in disposing such movable grate sections at an incline to a horizontal grate section.

Further, the invention resides in the salient features of construction and arrangements and combinations of parts hereinafter described and claimed, reference being had to the accompanying drawings wherein: Figure 1 is a side elevation of the grate with portions omitted; Fig. 2 is a fragmentary top plan of the grate; Fig. 3 is an end elevation of the furnace showing the grate dotted in position and the grate shaking or operating mechanism connected therewith; Fig. 4c is a similar view showing the grate operating mechanism in another position; Fig. 5 is a transverse section on line. 5-5 of Fig. Fig. 6 is a perspective view of a grate section; and Fig. 7 is a detailed vertical section illustrating one form of slidable connection between the movable grate sections and the horizontal grate.

The numeral. 1 designates the furnace walls having a stationary and horizontal main grate 2 which embodies a central section 3 hingedly mounted for swinging downwardly to permit of easy removal of clinkers. Below the grate is journaled a rock shaft 41 having its arm 5 connected to the central section 3 by a link 6 so that by partly rotating the shaft, as by a crank handle 7, the grate section may be either opened or closed, dependent upon the direction of rotation.

The inclined shaking grate sections 8 are arranged to one side of the main grate 2 and have their lower ends slidably supported by the latter while their upper ends rocked in opposite directions.

are each formed with a flat table portion 9 which slidably engages beneath one of the water tubes 10 disposed in the side of the furnace.

A pair of rocker frames 11 and 12 are mounted beneath the movable grate sections or bars 8 for reciprocating the latter. Each frame has a pair of downwardly facing seats or bearings 13 receiving and being supported by the fulcrum plates 1% at the base of the furnace. From the upper part of the frame extend spaced pairs of arms 15 each pair having their terminals freely resting in suitable recesses constituting seats 16 formed in the underside of the grate sections 8 and constituting supports there for. These recesses 16 may or may not eX- tend through the side faces of the grate sections. The arms 15 of the rockable frames are curved and offset from the frames, the arms of one frame being offset opposite to those of the other frame to permit of a greater movement being imparted to the grate sections, as will be apparent from Figs. 3 and 4: Furthermore, the pairs of arms on one frame are arranged opposite the spaces between adjacent pairs of arms on the other frame. Thus, every other grate section is supported by one frame and the alternating sections are supported by the other frame.

A second rock shaft 17 is journaled beneath the inclined grate portion and provided with oppositely extending arms 18 which are connected to the respective sec-' tions by links 19 in such a manner that on oscillation of the shaft, the frames will. be One end of the rock shaft projects from the furnace and carries an arm 20 which is connected by a pitman' 21 to a crank 22, the latter being journaled in a bearing 23 on the furnace and provided with a handle 24. By rotating the crank 22, the shaft 17 will be rocked or oscillated and, through the rockable frames, the inclined grate sections are reciprocated.

This arrangement brings the operating handle 24: up to a convenient height from the floor to be in an easy position for the fireman.

On the side of the furnace is a coal magazine 25 having a suitable closure 26 and discharging onto the upper portions of the movable grate sections 8. The lower ends of the latter are rounded ofi at 27 to form more or less of a wall by which the fuel is pushed or shoved over the horizontal grate. In this connection it will be noticed that the lower ends of the movable grate sections have a tendency to ride up over the coals and become inoperative or ineffective. To overcome this tendency, the lower ends are secured to the horizontal grate for sliding only. One form of connection is illustrated in Fig. 7 and comprises an inverted T- shaped shoe 28 carried by each grate section 8 and slidably engaged in a groove 29, of corresponding contour, formed in the main grate 2. The shoe is disposed rearwardly of the curved end 2'? a sufficient distance to always keep the groove covered by the grate section and thereby eliminate the collection of ashes and coal therein.

Owing to the swinging movement of the rockable frames, the movable grate sections are also given a slight vertical movement in addition to the reciprocatory action. During such reciprocation, the flat plate eXten sions 9 of the grate sections maintain a continuous path or chute from the coal magazine to the grate sections by extending beneath the discharge end of the magazine at all times.

From the foregoing, the operation will readily be understood, it being apparent that upon rotating the crank 22, the grate sections will be reciprocated in opposite directions and the coal spread uniformly over all the grate surface.

I am aware that various changes may be made as fall within the scope of the appended claims, the detailed description herein given being for clearness of understanding only.

'Vhat is claimed is:

1. In a furnace, a horizontal main grate, a plurality of inclined grate sections having their lower ends slidably engaged with the main grate, a pair of rockable frames each supporting different ones of the inclined grates, a rock shaft, arms on the shaft connected with the rockable frames, and means for oscillating the shaft.

2. In a furnace, a horizontal main grate, a plurality of inclined grate sections having their lower ends slidably engaged with the I ends of the movable grates, a fulcrum plate on which the frame freely rests, and oscillatory means connected to the frame for swinging the latter and holding it in position on the fulcrum plate.

a. In a furnace, a main grate, a second grate having one end slidable on the main grate, means for sliding the second grate, and means shdably connectlng the grates positively to each other to prevent the specilied end of the second grate from riding up off the main grate.

5. In a furnace, a stationary grate, a plurality of movable grates each having one end supported by the stationary grate, a pair of frames each pivotally supporting certain of the movable grates and provided with downwardly facing U-shaped bearings,

a common fulcrum means for the bearings of the frames, and oscillatory means con nected to each frame for swinging the latter in opposite directions and holding the same seated on the fulcrum means.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GEORGE F. SPENCER. \Vitnesses:

Bnssm B. LEWIS, CHARLES M. LEWIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

